Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbbe2211f2ee42b…

MALICIOUS

PDF

81.0 KB Created: 2021-06-10 19:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 20ee9c2f9744a19259debe920a338fbd SHA-1: 11d87cdaa3d51a010e18e6eaf8aca38c161b03cc SHA-256: 8bbbe2211f2ee42b949fb6e4546a914dd1dc749d66065bbffa7b5ec3fad6f42b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a lure to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/pbw?utm_term=genius+full+movie+2018+utkarsh+sharma PDF link annotation
    • https://wupizesave.weebly.com/uploads/1/3/4/5/134581048/d921f66a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_6054597285abe.pdfIn PDF document text
    • https://xarobugogowi.weebly.com/uploads/1/3/4/5/134594165/f79c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd1e4fd51c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_6068706f3ffa1.pdfIn PDF document text
    • https://jegesasep.weebly.com/uploads/1/3/4/5/134502647/nogapibexazuvenixak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc8de2f32c6b.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/zilev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_604afa9c93b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_601501c3ad963.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/nasorasefanaz-nuvapoxokeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_6019ddd6e5851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144473901/36590873631.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/lirolumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e1b373-da04-48fb-a535-c9fe0ae340ae/85387187549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abf3303-32b3-40a3-9961-ce9ac046e498/smartwatch_u8_ios_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d05451-b530-49ca-b545-d436d2980e11/54870073514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6f3659-1cc1-442b-9c4f-673ade02bef3/self_portrait_drawing_background_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8369381a-2f2e-4b13-bb5b-a11def8ef9bb/rebuild_sears_19.2_volt_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80761cf0-d108-4b5d-bd0e-2f028f8f6faf/3894999073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7fafaf4-6d53-4542-94eb-4aa62926d875/87551668298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7fbc8a-2679-4915-8a8e-9d60e8b1c5be/takumufiwen.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/f/sirisuwip.pdfIn PDF document text
    • http://zegakodas.pbworks.com/w/file/fetch/144657963/how_to_set_alarm_on_armitron_watch_wr330.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/95677922214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a9999f-9f72-46db-bc9b-a97f478036e6/the_official_act_prep_guide_2018-19_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dd08f2-cacf-4b80-a6d4-4a10ff54017a/saditulijase.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 5680 bytes
SHA-256: cfbe938c861374f557af06e0c9d706370eaea5d7c242ad22d8a80d7c54e51bd1
font_01_sfnt_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 10872 bytes
SHA-256: 8089cecd4de12c2c8bc5d44bedd9f0dfda1b49dbaf32cd8eb5dabc48145b4e7e
font_02_sfnt_off000120aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e